Finding the Fourth Proportional to 5,131.03, 7,697.72 and 1,621.02

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.03 : 7,697.72 = 1,621.02 : x
2. Step 2: Convert to fraction form
   5,131.03/7,697.72 = 1,621.02/x
3. Step 3: Cross multiply
   5,131.03x = 7,697.72 × 1,621.02
4. Step 4: Simplify right side
   5,131.03x = 12,478,158.07
5. Step 5: Solve for x
   x = 12,478,158.07/5,131.03
6. Step 6: Final answer
   x = 2,431.90